单项选择题
ERP (Enterprise Resource Planning) is()
A.企业管理计划 B.企业资源计划 C.企业物料计划 D.企业工作计划
单项选择题 ()is the charge for shipping goods.
单项选择题 ()is the most flexible mode of all the transport modes.
单项选择题 The package specification in the international trade is () than domestically.